This document provides guidelines for collecting, packaging, sealing, labeling, maintaining chain of custody, and transporting physical evidence. It discusses general precautions for evidence collection and outlines specific packaging procedures for different types of evidence, including blood, seminal stains, hairs, saliva, documents, fingerprints, and fire debris. Proper documentation and sealing of packages is emphasized to authenticate evidence and establish an unbroken chain of custody from crime scene to laboratory.